1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 1983, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #if 0 33 #ifndef lint 34 static const char copyright[] = 35 "@(#) Copyright (c) 1983, 1993\n\ 36 The Regents of the University of California. All rights reserved.\n"; 37 #endif /* not lint */ 38 39 #ifndef lint 40 static char sccsid[] = "@(#)uuencode.c 8.2 (Berkeley) 4/2/94"; 41 #endif /* not lint */ 42 #endif 43 #include <sys/cdefs.h> 44 __FBSDID("$FreeBSD$"); 45 46 /* 47 * uuencode [input] output 48 * 49 * Encode a file so it can be mailed to a remote system. 50 */ 51 #include <sys/param.h> 52 #include <sys/socket.h> 53 #include <sys/stat.h> 54 55 #include <netinet/in.h> 56 57 #include <err.h> 58 #include <errno.h> 59 #include <libgen.h> 60 #include <resolv.h> 61 #include <stdio.h> 62 #include <stdbool.h> 63 #include <stdlib.h> 64 #include <string.h> 65 #include <unistd.h> 66 67 extern int main_encode(int, char *[]); 68 extern int main_base64_encode(const char *, const char *); 69 70 static void encode(void); 71 static void base64_encode(void); 72 static int arg_to_col(const char *); 73 static void usage(void) __dead2; 74 75 static FILE *output; 76 static int mode; 77 static bool raw; 78 static char **av; 79 static int columns = 76; 80 81 int 82 main_base64_encode(const char *in, const char *w) 83 { 84 raw = 1; 85 if (in != NULL && freopen(in, "r", stdin) == NULL) 86 err(1, "%s", in); 87 output = stdout; 88 if (w != NULL) 89 columns = arg_to_col(w); 90 base64_encode(); 91 if (ferror(output)) 92 errx(1, "write error"); 93 exit(0); 94 } 95 96 int 97 main_encode(int argc, char *argv[]) 98 { 99 struct stat sb; 100 bool base64; 101 int ch; 102 const char *outfile; 103 104 base64 = false; 105 outfile = NULL; 106 107 if (strcmp(basename(argv[0]), "b64encode") == 0) 108 base64 = 1; 109 110 while ((ch = getopt(argc, argv, "mo:rw:")) != -1) { 111 switch (ch) { 112 case 'm': 113 base64 = true; 114 break; 115 case 'o': 116 outfile = optarg; 117 break; 118 case 'r': 119 raw = true; 120 break; 121 case 'w': 122 columns = arg_to_col(optarg); 123 break; 124 case '?': 125 default: 126 usage(); 127 } 128 } 129 argv += optind; 130 argc -= optind; 131 132 switch (argc) { 133 case 2: /* optional first argument is input file */ 134 if (!freopen(*argv, "r", stdin) || fstat(fileno(stdin), &sb)) 135 err(1, "%s", *argv); 136 #define RWX (S_IRWXU|S_IRWXG|S_IRWXO) 137 mode = sb.st_mode & RWX; 138 ++argv; 139 break; 140 case 1: 141 #define RW (S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP|S_IROTH|S_IWOTH) 142 mode = RW & ~umask(RW); 143 break; 144 case 0: 145 default: 146 usage(); 147 } 148 149 av = argv; 150 151 if (outfile != NULL) { 152 output = fopen(outfile, "w+"); 153 if (output == NULL) 154 err(1, "unable to open %s for output", outfile); 155 } else 156 output = stdout; 157 if (base64) 158 base64_encode(); 159 else 160 encode(); 161 if (ferror(output)) 162 errx(1, "write error"); 163 exit(0); 164 } 165 166 /* ENC is the basic 1 character encoding function to make a char printing */ 167 #define ENC(c) ((c) ? ((c) & 077) + ' ': '`') 168 169 /* 170 * Copy from in to out, encoding in base64 as you go along. 171 */ 172 static void 173 base64_encode(void) 174 { 175 /* 176 * This buffer's length should be a multiple of 24 bits to avoid "=" 177 * padding. Once it reached ~1 KB, further expansion didn't improve 178 * performance for me. 179 */ 180 unsigned char buf[1023]; 181 char buf2[sizeof(buf) * 2 + 1]; 182 size_t n; 183 unsigned carry = 0; 184 int rv, written; 185 186 if (!raw) 187 fprintf(output, "begin-base64 %o %s\n", mode, *av); 188 while ((n = fread(buf, 1, sizeof(buf), stdin))) { 189 rv = b64_ntop(buf, n, buf2, nitems(buf2)); 190 if (rv == -1) 191 errx(1, "b64_ntop: error encoding base64"); 192 if (columns == 0) { 193 fputs(buf2, output); 194 continue; 195 } 196 for (int i = 0; i < rv; i += written) { 197 written = fprintf(output, "%.*s", columns - carry, 198 &buf2[i]); 199 200 carry = (carry + written) % columns; 201 if (carry == 0) 202 fputc('\n', output); 203 } 204 } 205 if (columns == 0 || carry != 0) 206 fputc('\n', output); 207 if (!raw) 208 fprintf(output, "====\n"); 209 } 210 211 /* 212 * Copy from in to out, encoding as you go along. 213 */ 214 static void 215 encode(void) 216 { 217 int ch, n; 218 char *p; 219 char buf[80]; 220 221 if (!raw) 222 (void)fprintf(output, "begin %o %s\n", mode, *av); 223 while ((n = fread(buf, 1, 45, stdin))) { 224 ch = ENC(n); 225 if (fputc(ch, output) == EOF) 226 break; 227 for (p = buf; n > 0; n -= 3, p += 3) { 228 /* Pad with nulls if not a multiple of 3. */ 229 if (n < 3) { 230 p[2] = '\0'; 231 if (n < 2) 232 p[1] = '\0'; 233 } 234 ch = *p >> 2; 235 ch = ENC(ch); 236 if (fputc(ch, output) == EOF) 237 break; 238 ch = ((*p << 4) & 060) | ((p[1] >> 4) & 017); 239 ch = ENC(ch); 240 if (fputc(ch, output) == EOF) 241 break; 242 ch = ((p[1] << 2) & 074) | ((p[2] >> 6) & 03); 243 ch = ENC(ch); 244 if (fputc(ch, output) == EOF) 245 break; 246 ch = p[2] & 077; 247 ch = ENC(ch); 248 if (fputc(ch, output) == EOF) 249 break; 250 } 251 if (fputc('\n', output) == EOF) 252 break; 253 } 254 if (ferror(stdin)) 255 errx(1, "read error"); 256 if (!raw) 257 (void)fprintf(output, "%c\nend\n", ENC('\0')); 258 } 259 260 static int 261 arg_to_col(const char *w) 262 { 263 char *ep; 264 long option; 265 266 errno = 0; 267 option = strtol(w, &ep, 10); 268 if (option > INT_MAX) 269 errno = ERANGE; 270 else if (ep[0] != '\0') 271 errno = EINVAL; 272 if (errno != 0) 273 err(2, NULL); 274 275 if (option < 0) { 276 errno = EINVAL; 277 err(2, "columns argument must be non-negative"); 278 } 279 return (option); 280 } 281 282 static void 283 usage(void) 284 { 285 (void)fprintf(stderr, 286 "usage: uuencode [-m] [-o outfile] [infile] remotefile\n" 287 " b64encode [-o outfile] [infile] remotefile\n"); 288 exit(1); 289 } 290